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Add mov_r32_rm32(0x8b) instruction

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tuz358
2018-03-08 11:39:03 +09:00
parent 0b22a08b91
commit f3f4c68ba4
2 changed files with 52 additions and 0 deletions
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1
include/instructions.h
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@@ -81,6 +81,7 @@ public:
void jne_imm8(); // 0x75
void opcode_83(); // 0x83
void mov_rm32_r32(); // 0x89
void mov_r32_rm32(); // 0x8b
void nop(); // 0x90
void xchg_eax_r32(); // 0x91 ~ 0x97
void mov_eax_imm32(); // 0xb8

51
instructions.cpp
View File

@@ -75,6 +75,7 @@ void Instructions::init_instructions(){
this->instructions[0x75] = &Instructions::jne_imm8;
this->instructions[0x83] = &Instructions::opcode_83;
this->instructions[0x89] = &Instructions::mov_rm32_r32;
this->instructions[0x8b] = &Instructions::mov_r32_rm32;
this->instructions[0x90] = &Instructions::nop;
for(int i=0;i<7;i++){
this->instructions[0x91+i] = &Instructions::xchg_eax_r32;
@@ -982,6 +983,56 @@ void Instructions::mov_rm32_r32(){
}
}
void Instructions::mov_r32_rm32(){
//printf("mov_r32_rm32 called.\n");
uint32_t addr, dst, imm32;
uint8_t imm8;
this->modrm = memory.read_uint8(this->eip);
this->calc_modrm();
switch (this->mod) {
case 0:
// mov R, [M]
// addr : M
this->eip++;
addr = this->registers[this->M];
// dst : data of [M]
dst = memory.read_uint32(addr);
this->registers[this->R] = dst;
break;
case 1:
// mov R, [M+imm8]
this->eip++;
imm8 = memory.read_uint8(this->eip);
// addr : M
addr = this->registers[this->M];
// dst : data of [M+imm8]
dst = memory.read_uint32(addr + imm8);
this->registers[this->R] = dst;
this->eip++;
break;
case 2:
// mov R, [M+imm32]
this->eip++;
imm32 = memory.read_uint32(this->eip);
imm32 = swap_endian32(imm32);
// addr : M
addr = this->registers[this->M];
// dst : data of [M+imm32]
dst = memory.read_uint32(addr + imm32);
this->registers[this->R] = dst;
this->eip += 4;
break;
default:
// case mod == 3
// mov R, M
this->eip++;
this->registers[this->R] = this->registers[this->M];
break;
}
}
void Instructions::nop(){
//printf("nop called.\n");
}